Abstract
We measured the spin asymmetry in the scattering of 100 GeV longitudinally-polarized muons on transversely polarized protons. The asymmetry was found to be compatible with zero in the kinematic range 0.006 < x < 0.6, 1 < Q2 < 30 GeV2. From this result we derive the upper limits for the virtual photon-proton asymmetry A2, and for the spin structure function g2. For x < 0.15, A2 is significantly smaller than its positivity limit √R.
Original language | English |
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Pages (from-to) | 125-130 |
Number of pages | 6 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 336 |
Issue number | 1 |
DOIs | |
Publication status | Published - 15 Sept 1994 |
Externally published | Yes |
Funding
The nucleon spin-dependent structure functions, gl and g2, can be determined in deep inelastic scattering of polarized charged leptons on polarized nucleons. Both are important for the understanding of nucleon spin structure. The structure function gl is used to test QCD sum rules, and in the quark-parton model it determines the contribution of the quark spins to the 15 Supported by the National Science Foundation. 16 Supported by Ishida Foundation, Mitsubishi Foundation and Monbusho International Science Research Program. 17 Supported by the National Science Foundation (NWO) of the Netherlands. Is Supported by Comision Interministerial de Ciencia y Tecnologia. 19 Supported by the US-Israel Binational Science Foundation, Jerusalem, Israel and The Israeli Academy of Sciences. 20 Supported by KBN grant nr. 20958-9101. 21Permanent address: Belarussian State University, Minsk, Belarus. l Now at CERN, 1211 Geneva 23, Switzerland. 2 Now at University of Montreal, PQ, H3C 3J7, Montreal, Canada. 3 Now at Max Planck Institute, Heidelberg, Germany. 4 Permanent address: Paul Scherrer Institut, 5232 Villigen, Switzerland. 5 Permanent address: Miyazaki University, 88921 Miyazaki-Shi, Japan. 6 Permanent address: KEK, 305 Ibaraki-Ken, Japan. 7 Permanent address: University of Buenos Aires, Physics Department, 1428 Buenos Aires, Argentina. 8 Now at SSC Laboratory, Dallas, 75237 TX, USA. 9 Permanent address: The American University, Washington D.C. 20016, USA. lO Present address: ESFR, F-38043 Grenoble, France. l l Research Fellow of JSPS. 12 Partially supported by TUBITAK and Centre for Turkish-Balkan Physics Research and Applications (Bo~aziqi University). 13 Supported by Bundesministerium fiir Forschung und Technologie. 14 Supported by the U.S. Department of Energy.
Funders | Funder number |
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Bo~aziqi University | |
Centre for Turkish-Balkan Physics Research and Applications | |
Ishida Foundation | |
Israeli Academy of Sciences | |
KBN | 20958-9101 |
Monbusho International Science Research Program | |
TUBITAK | |
National Science Foundation | |
U.S. Department of Energy | |
United States-Israel Binational Science Foundation | |
Nederlandse Organisatie voor Wetenschappelijk Onderzoek | |
Mitsubishi Foundation | |
Bundesministerium für Forschung und Technologie | |
Comisión Interministerial de Ciencia y Tecnología |